Tag: different nutrients in food

Questions Related to different nutrients in food

The molecule used by most animals for long term energy storage is

biology food for health fats fats and their test different nutrients in food

  1. Starch

  2. Fat

  3. Protein

  4. Glycogen

Show answer
Correct Option: B
Explanation:

The fats contain more energy per gram than carbohydrates and as a result of this, the body tends to use fat to store energy over long periods of time and uses carbohydrates to store energy short-term.
Therefore, the correct answer is option B.

Fats and carbohydrates are together called as 

biology food for health fats fats and their test different nutrients in food

  1. Protective foods

  2. Harmful foods

  3. Body building foods

  4. Energy giving foods

Show answer
Correct Option: D
Explanation:

We need energy for doing work. Energy is provided by carbohydrates and fats. Carbohydrates and fats on oxidation liberate energy. As compared to fats, carbohydrates get easily oxidized and converted into glucose and provide energy. One gram of carbohydrate yields about 17 kilo-joule of energy, whereas one gram of fat produces 37 kilo-joule of energy. This is the reason why carbohydrates and fats are called as energy food.

Cholesterol is synthesised in

biology food for health fats fats and their test different nutrients in food

  1. Brunner's gland

  2. Pancreas

  3. Liver

  4. Spleen

Show answer
Correct Option: C
Explanation:

Slightly less than half of the cholesterol in the body derives from biosynthesis de novo. Biosynthesis in the liver accounts for approximately 10% and in the intestines approximately 15%, of the amount produced each day. The cholesterol biosynthesis pathway involves enzymes that are in the cytoplasm, microsomes (ER), and peroxisomes. Synthesis of cholesterol, like that of most biological lipids, begins from the two-carbon acetate group of acetyl-CoA. Cholesterol synthesis does not occurs in pancreas, spleen and Brunner's gland. 

So, the correct answer is 'Liver'

Oxidation of which of the following substances in the body yields more amount of calories?

biology food for health fats fats and their test different nutrients in food

  1. Glucose

  2. Glycogen

  3. Protein

  4. Lipids

Show answer
Correct Option: D
Explanation:

Oxidation refers to the direct breakdown of nutrients for energy. Fats or lipids have the highest energy content of 9 kcal/gm while proteins and carbohydrates have 4 kcal/gm.
Therefore, the correct answer is option D.

Name two end-products of $\beta$-oxidation of fatty acid

biology food for health fats fats and their test different nutrients in food

  1. Pyruvate

  2. Acetic acid

  3. $FADH _2$

  4. $NADPH _2$

Show answer
Correct Option: C,D
Explanation:

Products of $\beta$-oxidation are as follows-
a) Acetyl ${C} _{0}A$
b) $FAD{H} _{2}$
c) $NAD{H} _{2}$

Which category of compound is most concentrated energy source?

biology food for health fats fats and their test different nutrients in food

  1. Lipid

  2. Carbohydrates

  3. Proteins

  4. Vitamins

Show answer
Correct Option: A
Explanation:
Lipids are a group of naturally occurring molecules that include fats, waxes, sterols, fat-soluble vitamins (such as vitamins A, D, E, and K), monoglycerides, diglycerides, triglycerides, phospholipids, and others. The main biological functions of lipids include storing energy, signaling, and acting as structural components of cell membranes.
Triglycerides, stored in adipose tissue, are a major form of energy storage both in animals and plants. The adipocyte, or fat cell, is designed for continuous synthesis and breakdown of triglycerides in animals, with breakdown controlled mainly by the activation of hormone-sensitive enzyme lipase. The complete oxidation of fatty acids provides high caloric content, about 9 kcal/g, compared with 4 kcal/g for the breakdown of carbohydrates and proteins. Migratory birds that must fly long distances without eating use stored energy of triglycerides to fuel their flights.

Fats 

biology food for health fats fats and their test different nutrients in food

  1. Are building blocks of our body

  2. Maintain metabolic rate

  3. Keep body temperature in the normal range

  4. Are stored to give energy

Show answer
Correct Option: D
Explanation:

Although, the main source of energy for our bodies is carbohydrates, fat is used as a source of backup energy in cases when carbohydrates are not available. This is a concentrated energy source but it is important to remember that each gram of fat has nine calories (over double the calories from protein and carbohydrates) so you should avoid having more than 20 to 35% of your daily calories from fat. In a 1,800 calorie diet, you should only consume 40-70 grams of fat.

You can find fats abundantly in 

biology food for health fats fats and their test different nutrients in food

  1. Wheat, rice, sugar and potatoes

  2. Ghee, oil, milk and groundnuts

  3. Soybeans, fish and meat

  4. Carrots, mangoes and lemon fruits

Show answer
Correct Option: B
Explanation:
Dietary fats are one of the three major components or macro-nutrients of all foods. The other two are carbohydrates and proteins. During digestion, dietary fats are broken down and their constituents, glycerol and fatty acids, are released. Fatty acids have many important functions in the body.
Dietary fat is a source of energy for your body. The glycerol you get along with dietary fatty acids can be converted directly into glucose by the liver. The fatty acids, however, have to go through a series of transformations before they are turned into glucose.
Here are 10 high-fat foods that are actually incredibly healthy and nutritious.
Avocado, nuts, cheese, oil, ghee, fish, milk, dark chocolates, whole egg and full fat yoghurt.

Number of essential fatty acids is

biology food for health fats fats and their test different nutrients in food

  1. $6$

  2. $4$

  3. $3$

  4. $2$

Show answer
Correct Option: A
Explanation:

Non-essential fatty acids are those fatty acids that the body can synthesize on its own. Essential fatty acids are those fatty acids that are required by the body but it cannot synthesize. There are two essential fatty acids, linoleic and alpha-linolenic acid. These must be obtained from food. 

Thus, the correct answer is option D.

Cow's milk is slightly yellowish in colour due to the presence of

biology food for health fats fats and their test different nutrients in food

  1. Carotene

  2. Riboflavin

  3. Xanthophyll

  4. Xanthophyll and carotene

Show answer
Correct Option: B
Explanation:

Because riboflavin is an orange-yellow compound, so cow's milk appears slightly yellowish.